1.

The potential energy function for a particle executing linear SHM is given by V(x) =1/2kx^(2) wher e k is the force constant of the oscillator (figure). For k = 0.5 N/m ,the graph ofV(x) versus x is shown in the figure . A particle oftotal energyE turnsbackwhen it reachesx = pm x_(m) . If V and K indicate the PE and KE , respectivelyof the particle at x = +x_(m) , then which of the following is correct ?

Answer»

V =0 ,K=E
V = E,K=0
`V lt E , K = 0 `
`V = 0 ,K=0`

SOLUTION :Total ENERGY is E = PE +KE …(i)
At `X = x_(m), v = 0 ,KE = 0 `
From Eqn.(i)
`E = pE +0 = PE =V(x_(m)) =1/2 kx_(m)^(2)`


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